[168209] in North American Network Operators' Group
Re: gmail.com - 550 error for ipv6/PTR ?
daemon@ATHENA.MIT.EDU (Darren Pilgrim)
Wed Jan 15 13:06:00 2014
Date: Wed, 15 Jan 2014 10:05:50 -0800
From: Darren Pilgrim <nanog@bitfreak.org>
To: Brandon Applegate <brandon@burn.net>, nanog@nanog.org
In-Reply-To: <alpine.DEB.2.00.1401141859270.4083@orbital.burn.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 1/14/2014 4:06 PM, Brandon Applegate wrote:
> Just saw this in a message tonight. No idea if this is a transient error
> or not.
>
> ---
> host gmail-smtp-in.l.google.com
> [gmail-smtp-in.l.google.com][2607:f8b0:4002:c01::1a]
> said: 550-5.7.1 [2607:ff70:11::11] Our system has detected that this
> message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR
> records and authentication 550-5.7.1 . Please review 550-5.7.1
> https://support.google.com/mail/?p=ipv6_authentication_error
> [support.google.com] for more 550
> 5.7.1 information. t26si2290895yhl.255 - gsmtp (in reply to end of DATA
> command)
I saw a number of these as well but in my case the bracketed IP
addresses were malformed. For example:
host gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a] said: 550-5.7.1
[2607:fc50:1000:1f00::2 16] Our system has detected that this
550-5.7.1 message does not meet IPv6 sending guidelines...
